Final answer:
The symbol that represents a type of radiation with the same mass as an electron and a positive charge is He, which stands for Helium nuclei.
Step-by-step explanation:
The symbol that represents a type of radiation with the same mass as an electron and a positive charge is He, which stands for Helium nuclei.
Helium nuclei, also known as alpha particles, are made up of two protons and two neutrons, giving them a mass equal to that of an electron.
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